IEC 61850-9-2:20 1+A1:2020根据IEC 61850-7-2中的抽象规范定义了用于传输采样值的特定通信服务映射。该映射是使用直接访问ISO/IEC 8802-3链路以结合IEC 61850-8-1传输样本的混合堆栈上的抽象模型的映射。与第一版相比的主要变化是: -添加可选的链路冗余层； -在链路层中重新定义“保留”字段； -USVCB和MSVCB组件的演变； -用于采样值缓冲器的传输的编码的演变。 该合并版本由第二版（2010年）及其修正案1（2020年）组成。因此，除本出版物外，无需下令修订。

IEC 61850-9-2:2011+A1:2020 defines the specific communication service mapping for the transmission of sampled values according to the abstract specification in IEC 61850-7-2. The mapping is that of the abstract model on a mixed stack using direct access to an ISO/IEC 8802-3 link for the transmission of the samples in combination with IEC 61850-8-1. Main changes with respect to the first edition are:
- addition of an optional link redundancy layer;
- redefinition of "reserved" fields in link layer;
- evolution of USVCB and MSVCB components;
- evolution of encoding for the transmission of the sampled value buffer.
This consolidated version consists of the second edition (2010) and its amendment 1 (2020). Therefore, no need to order amendment in addition to this publication.